摘要:
A nip former that forms a nip between an endless belt and a pressure rotator includes a base that is made of aluminum and has a nip forming face disposed opposite the nip. An anodic oxidation coating is treated with sealing and coats at least the nip forming face. The anodic oxidation coating has a thickness that is not smaller than 22 μm and is not greater than 45 μm and a variation in thickness that is not greater than 20 percent. The base and the anodic oxidation coating define a nip forming portion that is disposed opposite the nip. The nip forming portion has a thickness that is not smaller than 0.40 mm and is not greater than 1.20 mm.
摘要:
A fixing device includes a fixing rotator rotatable in a rotation direction, a heat source to heat the fixing rotator, a pressure rotator contacting the fixing rotator, a nip formation pad to form a fixing nip between the fixing rotator and the pressure rotator, a slide sheet, and an adhesive part. The slide sheet between the fixing rotator and the nip formation pad contacts an inner circumferential face of the fixing rotator. The slide sheet has a center part and both end parts in an axial direction orthogonal to the rotation direction. The adhesive part bonds the slide sheet to the nip formation pad. The adhesive part includes a first adhesive part on the center part and a second adhesive part on one of the end parts. The first adhesive part has a first area, and the second adhesive part has a second area smaller than the first area.
摘要:
An image forming apparatus includes an image forming section, a fixing device, and circuitry. The image forming section forms an image on a recording medium. The fixing device includes a rotator including a flexible endless belt, a pressure rotator pressed against the rotator to form a nip between the rotator and the pressure rotator, a heater heating the rotator, and a movable shield. The movable shield is disposed between the heater and the rotator to shield the rotator from radiant heat generated from the heater and is movable according to a size of the recording medium. The circuitry is configured to control the image forming section to form the image on the recording medium based on an image forming condition and change at least one of an operating temperature of the movable shield or a shielding amount of the movable shield based on the image forming condition.
摘要:
A fixing device includes a first rotator and a second rotator that form a nip therebetween and fix an image on a recording medium that enters the nip. A heater heats at least one of the first rotator or the second rotator. A controller controls the heater to switch between a first heating and a second heating, to switch from the first heating to the second heating before the recording medium enters the nip, to start the second heating at a time prior to a nip entry time at which the recording medium enters the nip by a delay time period taken for the heater to conduct heat to the nip, and to continue the first heating before the second heating for at least one control cycle at a duty cycle of power supplied to the heater. The duty cycle is not greater than 40%.
摘要:
A heating device includes a rotator, a heating source, a reflector, a shield, a rotator holder, and a liquid or semi-solid substance. The rotator is rotatably held. The heating source heats the rotator. The reflector reflects radiant heat emitted from the heating source. The shield is disposed closer to a longitudinal end portion of the rotator than to a longitudinal center portion of the rotator to shield, between the heating source and the rotator, the radiant heat emitted from the heating source. The shield has a reflectance lower than a reflectance of the reflector. The rotator holder holds the longitudinal end portion of the rotator. The liquid or semi-solid substance has lubricity and adheres to the rotator holder.
摘要:
Provided is a toner including toner particles. Each of the toner particles includes a toner base particle including a binder resin and a release agent. The toner particles have an average circularity of 0.974 or greater and 0.985 or less. An arithmetic mean height Sa of surfaces of the toner particles is 45 nm or greater. The toner particles have a BET specific surface area of 1.3 m2/g or greater and 2.5 m2/g or less.
摘要:
To provide a converter module easily achieving miniaturization and profile reduction without decreasing the pressure detection sensitivity. The converter module includes: a converter which converts vibration of a diaphragm into an electric signal; and a semiconductor substrate which processes the electric signal obtained as a result of the conversion performed by the converter. The converter includes: a base including a cavity part having an opening in a front surface of the base; and the diaphragm which is arranged on the front surface to cover the opening of the cavity part and converts the vibration into the electric signal. The semiconductor substrate is formed as a part of the base.
摘要:
The toner includes a binder resin; a colorant; and a release agent. The first inter-particle force Fp(A) of the toner, which is measured under an environmental condition of 23° C. and 60% RH after the toner is pressed for 1 minute at 25° C. under a compression stress of 15 kg/cm2, is from 1.0×10−9 (N) to 1.0×10−6 (N). The difference (Fp(B)−Fp(A)) between the second inter-particle force Fp(B) of the toner, which is measured under the environmental condition of 23° C. and 60% RH after the toner is pressed for 1 minute at 50° C. under a compression stress of 15 kg/cm2, and the first inter-particle force Fp(A) is 0 (N) to 1.0×10−7 (N).
摘要:
A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator slides. The slide surface has a larger hardness than a hardness of the sliding surface of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.
摘要:
A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator is to slide. The slide surface has a smaller surface roughness in a sliding direction of the rotator than a surface roughness of the sliding surface in the sliding direction of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.